CVE-2023-53746

Summary

In the Linux kernel, the following vulnerability has been resolved:

s390/vfio-ap: fix memory leak in vfio_ap device driver

The device release callback function invoked to release the matrix device uses the dev_get_drvdata(device *dev) function to retrieve the pointer to the vfio_matrix_dev object in order to free its storage. The problem is, this object is not stored as drvdata with the device; since the kfree function will accept a NULL pointer, the memory for the vfio_matrix_dev object is never freed.

Since the device being released is contained within the vfio_matrix_dev object, the container_of macro will be used to retrieve its pointer.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1fde573413b549d52183382e639c1d6ce88f5959 < 5195de1d5f66b276683240a896783f7f43c4f664affected
LinuxLinux1fde573413b549d52183382e639c1d6ce88f5959 < ee17dea3072dec0bc34399a32fa884e26342e4eaaffected
LinuxLinux1fde573413b549d52183382e639c1d6ce88f5959 < aa2bff25e9bb10c935c7ffe3d5f5975bdccb1749affected
LinuxLinux1fde573413b549d52183382e639c1d6ce88f5959 < 6a40fda14b4be3e38f03cc42ffd4efbc64fb3e67affected
LinuxLinux1fde573413b549d52183382e639c1d6ce88f5959 < 7b6a02f5bf15931464c79dfd487c57f76aae3496affected
LinuxLinux1fde573413b549d52183382e639c1d6ce88f5959 < 8f8cf767589f2131ae5d40f3758429095c701c84affected
LinuxLinux4.20affected
LinuxLinux0 < 4.20unaffected
LinuxLinux5.4.240 <= 5.4.*unaffected
LinuxLinux5.10.177 <= 5.10.*unaffected
LinuxLinux5.15.106 <= 5.15.*unaffected
LinuxLinux6.1.23 <= 6.1.*unaffected
LinuxLinux6.2.10 <= 6.2.*unaffected
LinuxLinux6.3 <= *unaffected

Weaknesses

References